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## Homework Statement

calculate the electric current in the 20 ohm resistor

## The Attempt at a Solution

I have no idea where to start, but i thought maybe you should calculate the voltage first and then the voltage over the 20 ohm resistor.

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- Thread starter nowayn
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- #1

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calculate the electric current in the 20 ohm resistor

I have no idea where to start, but i thought maybe you should calculate the voltage first and then the voltage over the 20 ohm resistor.

- #2

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You know the current through the parallel pair of resistors. How do you get from there to the current through the 20ohm resistor. You don't need voltage.## Homework Statement

calculate the electric current in the 20 ohm resistor

## The Attempt at a Solution

I have no idea where to start, but i thought maybe you should calculate the voltage first and then the voltage over the 20 ohm resistor.

- #3

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wait so is the current there also 0,3A?You know the current through the parallel pair of resistors.

- #4

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Do you understand the concepts of series elements and parallel elements? If you are not clear on that then you need to GET clear on it before trying ANY problems of this sort, else you will be perpetually confused.wait so is the current there also 0,3A?

- #5

gneill

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The current divider and the voltage divider are two concepts that you will find to be very handy to know about.

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- #7

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1/20=0,05

1/30=0,0333

0,08333/0,05=0,6

resistor with 20ohms will get 60% of the current

0,3*0,6=0,18

1/30=0,0333

0,08333/0,05=0,6

resistor with 20ohms will get 60% of the current

0,3*0,6=0,18

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